Method, system and computer program product for facilitating the design and assignment of ethernet vlans

ABSTRACT

A computer implemented method for facilitating creation of virtual local area networks (VLANs). The method includes: receiving a VLAN name, a class of service and two or more access ports; determining switches and trunks associated with the access ports; searching a VLAN database for the VLAN; and creating a VLAN if said searching does not result in locating the VLAN. The creating includes: selecting a starting access port from the two or more access ports; mapping a base path from the starting access port to another of the access ports, wherein the base path includes one or more of the switches and one or more of the trunks; and adding the base path to the VLAN including the starting access port and said another of the access ports.

This application is a continuation of U.S. patent application Ser. No. 10/666,069 filed Sep. 19, 2003, the contents of which are incorporated herein by reference in their entirety.

FIELD OF THE INVENTION

The present disclosure relates generally to facilitating the design and assignment of Ethernet VLANs and in particular, to a method of designing new VLANs and adding access ports to existing VLANs.

BACKGROUND OF THE INVENTION

Computer networks carry data between various devices. The data may be carried in connection-based links, such as the virtual circuits in an Asynchronous Transfer Mode (ATM) network. Data may also be carried between devices in network segments where data is broadcast to all of a plurality of devices on the segment via a broadcast-type medium. An example of the latter is an Ethernet network. It is typically convenient to set up local area networks (LANs) using a broadcast type medium over which devices can share data.

In some circumstances, for example, where a LAN is required to connect devices that are geographically distant from one another, the LAN may be broken into separate segments. Within each segment, devices (e.g., switches) can exchange data by way of a broadcast-type medium. The segments may be connected to one another by way of connection-based links such as physical transport lines. Such a LAN may be referred to as a virtual LAN (VLAN). A VLAN may be thought of as a logical web of connections over physical transports.

Metro-Ethernet networks are based on VLANs within the Ethernet network of a given metropolitan area. In order to provide this service to a customer, a service provider must design and assign a virtual network within the physical network for the customer. The VLAN creator is typically supplied with a VLAN name, a class of service (COS) for the VLAN and a certain number of access ports on the service provider Ethernet switches with the bandwidth (BW) required for each port. After the initial creation of the VLAN, access ports may be added or removed from the VLAN. Currently, the design of the VLAN and the assignment of access ports is performed manually with expert technicians attempting to take many constraints into consideration (e.g., BW required for each port, COS, layout of switches, layout of trunks, no loops allowed in VLAN, topology of VLAN). As VLANs become larger and more complex it becomes difficult and time consuming for technicians to manually design and assign VLANs.

BRIEF DESCRIPTION OF THE INVENTION

An exemplary embodiment is a computer implemented method for facilitating creation of virtual local area networks (VLANs). The method includes: receiving a VLAN name, a class of service and two or more access ports; determining switches and trunks associated with the access ports; searching a VLAN database for the VLAN; and creating a VLAN if said searching does not result in locating the VLAN. The creating includes: selecting a starting access port from the two or more access ports; mapping a base path from the starting access port to another of the access ports, wherein the base path includes one or more of the switches and one or more of the trunks; and adding the base path to the VLAN including the starting access port and said another of the access ports.

A further exemplary embodiment includes a system for facilitating creation of VLANs. The system includes a computer memory and a processor in communication with the computer memory. The processor includes an instruction fetching element for fetching instructions from memory and one or more execution elements for executing fetched instructions to perform a method. The method includes: receiving a VLAN name, a class of service and two or more access ports; determining switches and trunks associated with the access ports; searching a VLAN database for the VLAN; and creating a VLAN if said searching does not result in locating the VLAN. The creating a VLAN includes: selecting a starting access port from the two or more access ports; mapping a base path from the starting access port to another of the access ports, wherein the base path includes one or more of the switches and one or more of the trunks; and adding the base path to the VLAN including the starting access port and said another of the access ports.

A further exemplary embodiment is a computer-readable storage medium having computer-executable instructions for facilitating creation of VLANs. The computer-executable instructions when executed by a computer processor cause the computer processor to perform a method. The method includes: receiving a VLAN name, a class of service and two or more access ports; determining switches and trunks associated with the access ports; searching a VLAN database for the VLAN; and creating a VLAN if said searching does not result in locating the VLAN. The creating a VLAN includes: selecting a starting access port from the two or more access ports; mapping a base path from the starting access port to another of the access ports, wherein the base path includes one or more of the switches and one or more of the trunks; and adding the base path to the VLAN including the starting access port and said another of the access ports.

Other systems, methods and/or computer program products according to embodiments will be or become apparent to one with skill in the art upon review of the following drawings and detailed description. It is intended that all such additional systems, methods, and/or computer program products be within the scope of the present invention, and be protected by the accompanying claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Referring to the exemplary drawings wherein like elements are numbered alike in the several FIGURES:

FIG. 1 is a block diagram of an exemplary system for facilitating the design and assignment of Ethernet VLANs in accordance with exemplary embodiments of the present invention;

FIG. 2 is a flow diagram of an exemplary process for facilitating the design and assignment of Ethernet VLANs in accordance with exemplary embodiments of the present invention;

FIG. 3 is a block diagram of switches and physical transport lines that may be utilized in exemplary embodiments of the present invention; and

FIG. 4 is a block diagram of an exemplary VLAN that may be implemented utilizing the switches and physical transport lines depicted in FIG. 3.

DETAILED DESCRIPTION OF THE INVENTION

Embodiments of the present invention facilitate the design and assignment functions for creating new VLANs and adding access ports to existing VLANs. Trunks, or physical transport lines, connecting the switches containing access ports in a VLAN are selected by taking a number of assumptions and constraints into account. The service provider Ethernet topology (e.g., the layout of switches and trunks that connect them together) is one such constraint. The Ethernet network may be of any topological configuration such as hub and spoke, mesh or hybrid. A given VLAN instance on the network is assumed to be of a tree structure. This means that there are not any loops in the VLAN configuration (i.e., there can never be two different paths between any two points in the VLAN). A consequence of not having loops in the VLAN configuration is that for any given trunk in the VLAN, all access ports in the VLAN are divided into two non-overlapping sets. This in turn allows capacity management to be based on a least contribution algorithm. In addition, as new access ports are added to a VLAN, the tree structure is assured by the system by never allowing any new path added to continue beyond the first point of contact with the existing VLAN. Exemplary embodiments of the present invention receive a VLAN name, a COS and two or more access ports to be connected into the VLAN. If the VLAN does not currently exist, the first two ports are connected with a least cost path between them to form the base VLAN. Once a VLAN exists, access ports are connected into the VLAN with a least cost path to other access ports in the VLAN. The cost of a path may be determined by adding the cost of each trunk in the path.

Exemplary embodiments of the present invention calculate hub values and total hub values. The hub values are associated with each switch in the VLAN. The total hub value is the sum of the hub values for all the switches in the VLAN. The total hub value is calculated by exemplary embodiments of the present invention whenever more than one path is possible from a new access port into the VLAN. By minimizing this value, the VLAN is kept efficient and traffic transport is economized.

Exemplary embodiments of the present invention operate in the context of an operating support system (OSS) that manages metro-Ethernet services. The OSS system may provide the context of network intelligence and capacity tracking counters and control parameters that govern the logic of the design and assign algorithm. In exemplary embodiments of the present invention, the OSS has a database of network elements and trunks connecting them so that it can determine all of the network elements connected to any given network element. In addition, the OSS has a database of existing VLANs such that the VLAN names are unique across the region and each existing VLAN has an accessible list of network elements already in the connection paths of that VLAN. In addition, the OSS will provide capacity numbers to exemplary embodiments of the present invention to determine if there is enough available bandwidth on the trunk to add an access port with a specified bandwidth requirement and enough capacity on the switch to add another access port.

FIG. 1 is a block diagram of an exemplary system for facilitating the design and assignment of Ethernet VLANs in accordance with exemplary embodiments of the present invention. The exemplary system includes a host system 104 for executing an Ethernet VLAN design and assignment application. The system in FIG. 1 also includes one or more user systems 102 through which VLAN technicians located at one or more geographic locations may contact the host system 104 to initiate the execution of the design and assignment application. In exemplary embodiments of the present invention, the host system 104 executes the design and assignment application and the user system 102 is coupled to the host system 104 via a network 106. In alternate exemplary embodiments, the user system 102 is directly connected to the host system 104. Each user system 102 may be implemented using a general-purpose computer executing a computer program for carrying out the processes described herein. The user system 102 may be a personal computer (e.g., a lap top, a personal digital assistant) or a host attached terminal. If the user system 102 is a personal computer, the processing described herein may be shared by a user system 102 and the host system 104 (e.g., by providing an applet to the user system 102).

The network 106 may be any type of known network including, but not limited to, a wide area network (WAN), a local area network (LAN), a global network (e.g. Internet), a virtual private network (VPN), and an intranet. The network 106 may be implemented using a wireless network or any kind of physical network implementation known in the art. A user system 102 may be coupled to the host system 104 through multiple networks (e.g., intranet and LAN) so that not all user systems 102 are coupled to the host system 104 through the same network. One or more of the user systems 102 and the host system 104 may be connected to the network 106 in a wireless fashion.

The storage device 108 depicted in FIG. 1 may be implemented using a variety of devices for storing electronic information. It is understood that the storage device 108 may be implemented using memory contained in the host system 104 or it may be a separate physical device. The storage device 108 is logically addressable as a consolidated data source across a distributed environment that includes a network 106. The physical data may be located in a variety of geographic locations depending on application and access requirements. Information stored in the storage device 108 may be retrieved and manipulated via the host system 104. The storage device 108 includes interim data utilized to perform the design and assignment of an Ethernet VLAN as well as the resulting VLAN layout. In addition, the storage device 108 includes access to operational data such as a database of network elements and trunks, a database of existing VLANs and the network elements associated with the VLANs, and capacity data for the trunks and switches. The storage device 108 may also include other kinds of data such as information concerning the creation and update of the VLAN layouts (e.g., date, time of creation/update and technician identification). In exemplary embodiments of the present invention, the host system 104 operates as a database server and coordinates access to application data including data stored on storage device 108. Access to data contained storage device 108 may be restricted based on user characteristics.

The host system 104 depicted in FIG. 1 may be implemented using one or more servers operating in response to a computer program stored in a storage medium accessible by the server. The host system 104 may operate as a network server (e.g., a web server) to communicate with the user system 102. The host system 104 handles sending and receiving information to and from the user system 102 and can perform associated tasks. The host system 104 may reside behind a firewall to prevent unauthorized access to the host system 104 and enforce any limitations on authorized access. A firewall may be implemented using conventional hardware and/or software as is known in the art.

The host system 104 may also operate as an application server. The host system 104 executes one or more computer programs to facilitate the design and assignment of an Ethernet VLAN. One or more application programs within the host system 104 share information to support the design and assignment process. The processing of the design and assignment application may be shared by a user system 102 and the host system 104 by providing an application (e.g., a java applet) to the user system 102. As previously described, it is understood that separate servers may be utilized to implement the network server functions and the application server functions. Alternatively, the network server, the firewall, and the application server may be implemented by a single server executing computer programs to perform the requisite functions.

FIG. 2 is a flow diagram of an exemplary process for facilitating the design and assignment of Ethernet VLANs in accordance with exemplary embodiments of the present invention. At step 202, a VLAN name, COS and two or more access ports are received. At step 204, it is determined if the VLAN already exists. In exemplary embodiments of the present invention this may be performed by accessing an operational database that includes a listing of currently existing VLANs. In addition, the operational database may include the network elements (e.g. switches) and access ports (including bandwidths) within each VLAN. If the VLAN exists, as determined at step 204, then step 210 is performed to add the access port(s) to the VLAN. The access ports are physically located on switches. Otherwise, if the VLAN does not currently exist, step 206 is performed to start creating a VLAN from the access ports received at step 202. At step 206, a starting access port is selected. Unless otherwise instructed, any access port may be selected from the access ports received at step 202 to be the starting access port. Next, at step 208, a base path is selected from the starting access port to another access port received at step 202. A list of potential paths (including a list of switches) is created, by listing the shortest path (least number of hops from access port to access port) from the starting access port to a subset of the access ports received at step 202. A pre-selected number (e.g., up to 4) of the access ports located on different switches may be randomly selected to be included in the subset or the subset may be selected based on other criteria. The longest path from the starting access port to any of the subset of access ports is then selected for a base path for the VLAN. If there are one or more longest path candidates, any of them may be selected as the base path for the VLAN. The bandwidth on one side and the other of each trunk in the base path is calculated. In addition, the contribution of the base VLAN to each trunk is calculated and capacity counters are updated.

Next, starting at step 210, a loop is performed to add each new access port received at step 202 to the existing VLAN. At step 210, a list of the possible physical paths from the new access port to a switch in the VLAN is created. The list only contains those physical transport lines and switches that contain capacity for the new access port. The capacity may be verified against data from an operational support system for tracking capacity. Next, at step 212, it is determined if there is more than one physical path from the new access port to a switch contained in the VLAN. If there is more than one physical path, then step 214 is performed to calculate the total hub value associated with each of these physical paths. At step 216, the path resulting in the lowest total hub value is selected. The new access port is connected to the VLAN via the selected path at step 218. In addition, the BW contribution is calculated and capacity is checked. If more access ports remain to be connected into the VLAN, as determined at step 220, then the process of adding an access port, starting at step 210 is repeated. If there are no more access ports to connect into the VLAN, as determined at step 220, then the processing is complete. When the design and assignment of the VLAN has been completed, the design may be transmitted to an operational support system to implement the design. Implementing may include provisioning the VLAN and making it available to the customer.

In the following example, a simplified Ethernet VLAN is created using exemplary embodiments of the present invention. The example is simplified to show how exemplary embodiments of the present invention may operate, however, a typical Ethernet VLAN may include twenty or more access ports. FIG. 3 is a block diagram of switches and physical transport lines that may be utilized in exemplary embodiments of the present invention. The block diagram includes switch A 302, switch B 304, switch C 306, switch D 308 and switch G 310 connected via various paths by physical transport lines labeled “1” through “6.”

In this example, it is assumed that that VLAN is new and that the input data includes a the VLAN name “Sample”, a COS (e.g., Best Effort, Committed BW, Priority Plus) and four access ports: access port “a” 402 located at switch A 302 with a 100 Megabyte (M) bandwidth; access port “b” 404 located at switch B 304 with a 100 M bandwidth; access port “d” 408 located at switch D 308 with a 100 M bandwidth; access port “g” 410 located at switch G 310 with a 100 M bandwidth. A starting access port, access port “g” 410 is selected at random (see step 206 in FIG. 2). Next, a base path from the starting access port to another access port is selected (see step 208 in FIG. 2). Paths from access port “g” 410 to the other access ports include: switch G 310 to switch A 302 (GA); switch G 310 to switch C 306 to switch B 304 (GCB); and switch G 310 to switch C 306 to switch D 308 (GCD). Because there are two paths that include three switches (GCB, GCD), one of them “GCD” is selected at random as a base path for the Sample VLAN.

Now, each of the other access ports is connected into the Sample VLAN (see step 210 in FIG. 2). Access port “a” 402 is randomly selected to be connected to the sample VLAN first. Physical transport line “4” connects access port “a” 402 to switch C 306 which is included in the VLAN. In addition, physical transport line “5” connects access port “a” 402 to switch G 310 which is also included in the VLAN. These are the only two physical transport lines out of the switch A 302 where access port “a” 402 is located. The next hop on both of these transport lines is a VLAN network element so a decision about which to use is made by calculating the total hub value associated with each possibility (see step 214 in FIG. 2) if both have the capacity to handle a BW of 100 M for the request COS. The total hub value associated with connecting switch A 302 to switch G 310 (AG) may be calculated as follows:

Current Hub Additional New Hub Switch Value Value Value G 200 (DCG) 100 (AG) 300 C 200 (GC, DC) 200 (AGC) 400 D 200 (GCD) 300 (AGCD) 500 TOTAL HUB VALUE for AG 1200

Similarly, the total hub value associated with connecting switch A 302 to switch C 306 (AC) may be calculated as follows:

Current Hub Additional New Hub Switch Value Value Value G 200 (DCG) 200 (ACG) 400 C 200 (GC, DC) 100 (AC) 300 D 200 (GCD) 200 (ACD) 400 TOTAL HUB VALUE for AC 1100

Therefore, because it results in a lower total hub value, the path from switch A 302 to switch C 306 (AC) is selected for access port “a” 402. This path is then added to the VLAN (see step 218 in FIG. 2).

One more access port remains to be connected to the Sample VLAN (see step 220 in FIG. 2). The process of connecting access port “b” 404 to the VLAN begins by determining the shortest path with capacity to connect into the existing VLAN (see step 210 in FIG. 2). Physical transport line “6” connects access port “b” 404 to switch D 308 which is included in the VLAN. In addition, physical transport line “2” connects access port “b” 404 to switch C 306 which is included in the VLAN. These are the only two physical transport lines out of the switch B 304 where access port “b” 404 is located. The next hop on both of these transport lines is a VLAN network element so a decision about which to use is made by calculating the total hub value associated with each possibility (see step 214 in FIG. 2) if both have capacity to handle a BW of 100 M for the requested COS. The total hub value associated with connecting switch B 304 to switch D 308 (BD) may be calculated as follows:

Current Hub Additional New Hub Switch Value Value Value G 400 (DCG, ACG) 300 (BDCG) 700 C 300 (GC, AC, DC) 200 (BDC) 500 D 400 (GCD, ACD) 100 (BD) 500 A 400 (GCA, DCA) 300 (BDCA) 700 TOTAL HUB VALUE for BD 2400

Similarly, the total hub value associated with connecting switch B 304 to switch C 306 (BC) maybe calculated as follows:

Current Hub Additional New Hub Switch Value Value Value G 400 (DCG, ACG) 200 (BCG) 600 C 300 (GC, DC, AC) 100 (BC) 400 D 400 (GCD, ACD) 200 (BCD) 600 A 400 (GCA, DCA) 200 (BCA) 600 TOTAL HUB VALUE for BC 2200

Therefore, because it results in a lower total hub value, the path from switch B 304 to switch C 306 (BC) is selected for access port “b” 404. This path is then added to the VLAN (see step 218 in FIG. 2). FIG. 4 is a block diagram of the resulting exemplary VLAN that may be implemented utilizing exemplary embodiments of the present invention with the switches and physical transport lines depicted in FIG. 3.

Other exemplary embodiments of the present invention include receiving a switch that is designated as the hub switch as part of the input to the process depicted in FIG. 2. When a hub switch is designated, the connection of each access port includes finding the shortest available path from the switch associated with the access port to the hub switch. Otherwise, the processing is similar to that described in reference to FIG. 2. In other alternate exemplary embodiments of the present invention, the access ports require different BWs and this is taken account in determining the hub value when connecting a new access port. For example, if the BW of a particular access port is 200 M, then each hop from that access port would count as 200 in determining the hub values.

Other alternate exemplary embodiments may reflect different costs associated with each hop, or trunk, between switches. These may be factored into the determination of the paths utilized by a VLAN, resulting in selection of least cost paths rather than shortest paths. Different costs may be assigned to trunks to encourage the use of new technology that may be less expensive or conversely to recoup the additional costs that may be associated with a higher cost connection. Alternatively, costs may be increased on old technology that the service provider is attempting to phase out. The way that the costs are assigned to hops may be utilized to encourage the use of particular transport lines and to discourage the use of other transport lines.

Exemplary embodiments of the present invention allow the design and assignment of VLANs to be performed while taking into account a variety of factors including the BW required for each port, the requested COS, the layout of switches and trunks, the requirement for no loops in the VLAN, and the current topology of VLAN. This may lead to better VLAN designs and to more efficient utilization of the underlying trunks and switches. In addition, utilizing exemplary embodiments of the present invention may result in cost savings due to less expert technician time being required to design and assign VLANs.

As described above, the embodiments of the present invention may be embodied in the form of computer-implemented processes and apparatuses for practicing those processes. Embodiments of the present invention may also be embodied in the form of computer program code containing instructions embodied in tangible media, such as floppy diskettes, CD-ROMs, hard drives, or any other computer-readable storage medium, wherein, when the computer program code is loaded into and executed by a computer, the computer becomes an apparatus for practicing the invention. Exemplary embodiments of the present invention can also be embodied in the form of computer program code, for example, whether stored in a storage medium, loaded into and/or executed by a computer, or transmitted over some transmission medium, such as over electrical wiring or cabling, through fiber optics, or via electromagnetic radiation, wherein, when the computer program code is loaded into and executed by a computer, the computer becomes an apparatus for practicing the invention. When implemented on a general-purpose microprocessor, the computer program code segments configure the microprocessor to create specific logic circuits.

While the invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents maybe substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims. Moreover, the use of the terms first, second, etc. do not denote any order or importance, but rather the terms first, second, etc. are used to distinguish one element from another. 

1. A computer implemented method for facilitating creation of virtual local area networks (VLANs), the method comprising: receiving a VLAN name, a class of service and two or more access ports, the receiving at a computer; determining switches and trunks associated with the access ports, the determining performed by the computer; searching a VLAN database for the VLAN, the searching performed by the computer; and creating a VLAN if said searching does not result in locating the VLAN, the creating performed by the computer and including: selecting a starting access port from the two or more access ports, mapping a base path from the starting access port to another of the access ports, wherein the base path includes one or more of the switches and one or more of the trunks, and adding the base path to the VLAN including the starting access port and said another of the access ports.
 2. The method of claim 1 wherein the mapping a base path includes: selecting a pre-selected number of the two or more access ports; creating a list of least cost paths from the starting access port to each of the selected access ports, wherein each of the paths include one or more of the switches and one or more of the trunks; and selecting a longest length path from the list for the base path.
 3. The method of claim 2 wherein each of the two or more access ports includes a corresponding bandwidth requirement and the mapping a base path further includes: determining if each of the least cost paths in the list has capacity for the bandwidth requirement corresponding to said another of the access ports; and deleting a least cost path from the list in response to the least cost path not having capacity.
 4. The method of claim 3 wherein the determining if each of the least cost paths in the list has capacity for the bandwidth requirement corresponding to said another of the access ports includes receiving capacity data from an operational support system.
 5. The method of claim 2 wherein each of the two or more access ports includes a corresponding bandwidth requirement and the mapping a base path further includes: determining if each of the least cost paths in the list has capacity for the bandwidth requirement corresponding to said another of the access ports in the class of service; and deleting a least cost path from the list in response to the least cost path not having capacity.
 6. The method of claim 1 further comprising for each of the two or more access ports not currently located in the VLAN: mapping a new path from the access port to one of the switches in the VLAN; adding the new path to the VLAN including the access port; and transmitting the VLAN to the VLAN database.
 7. The method of claim 6 wherein the mapping a new path includes: creating a list of one or more least cost paths from the access port to one of the switches located in the VLAN; and selecting the shortest length path from the list for the new path, wherein if there is more than one shortest length path then selecting the one resulting in a lowest total hub value for the VLAN for the new path.
 8. The method of claim 7 wherein each of the two or more access ports includes a corresponding bandwidth requirement and the mapping a new path further includes: determining if each of the least cost paths in the list has capacity for the bandwidth requirement corresponding to the access port; and deleting a least cost path from the list in response to the least cost path not having capacity.
 9. The method of claim 7 wherein calculating the total hub value includes: creating a list of least cost paths from each of the switches in the shortest length path to each of the switches in the VLAN; and calculating a total bandwidth transport required by the list of least cost paths, wherein the total bandwidth transport required is the total hub value.
 10. The method of claim 7 wherein each of the two or more access ports include a corresponding bandwidth requirement and the mapping a new path further includes: determining if each of the least cost paths in the list has capacity for the bandwidth requirement corresponding to the access port in the class of service; and deleting a least cost path from the list in response to the least cost path not having capacity.
 11. The method of claim 10 wherein the determining if each of the least cost paths in the list has capacity for the bandwidth requirement corresponding to the access port in the class of service includes receiving capacity data from an operational support system.
 12. A system for facilitating creation of virtual local area networks (VLANs), the system comprising: a computer memory; and a processor in communication with the computer memory, the processor comprising an instruction fetching element for fetching instructions from memory and one or more execution elements for executing fetched instructions to perform a method comprising: receiving a VLAN name, a class of service and two or more access ports; determining switches and trunks associated with the access ports; searching a VLAN database for the VLAN; and creating a VLAN if said searching does not result in locating the VLAN, the creating including: selecting a starting access port from the two or more access ports, mapping a base path from the starting access port to another of the access ports, wherein the base path includes one or more of the switches and one or more of the trunks, and adding the base path to the VLAN including the starting access port and said another of the access ports.
 13. The system of claim 12 wherein the mapping a base path includes: selecting a pre-selected number of the two or more access ports; creating a list of least cost paths from the starting access port to each of the selected access ports, wherein each of the paths include one or more of the switches and one or more of the trunks; and selecting a longest length path from the list for the base path.
 14. The system of claim 13 wherein each of the two or more access ports includes a corresponding bandwidth requirement and the mapping a base path further includes: determining if each of the least cost paths in the list has capacity for the bandwidth requirement corresponding to said another of the access ports; and deleting a least cost path from the list in response to the least cost path not having capacity.
 15. The system of claim 14 wherein the determining if each of the least cost paths in the list has capacity for the bandwidth requirement corresponding to said another of the access ports includes receiving capacity data from an operational support system.
 16. The system of claim 12 wherein the method further comprises for each of the two or more access ports not currently located in the VLAN: mapping a new path from the access port to one of the switches in the VLAN; adding the new path to the VLAN including the access port; and transmitting the VLAN to the VLAN database.
 17. The system of claim 16 wherein the mapping a new path includes: creating a list of one or more least cost paths from the access port to one of the switches located in the VLAN; and selecting the shortest length path from the list for the new path, wherein if there is more than one shortest length path then selecting the one resulting in a lowest total hub value for the VLAN for the new path.
 18. A computer-readable storage medium having computer-executable instructions for facilitating creation of virtual local area networks (VLANs), wherein the computer-executable instructions when executed by a computer processor cause the computer processor to perform a method comprising: receiving a VLAN name, a class of service and two or more access ports; determining switches and trunks associated with the access ports; searching a VLAN database for the VLAN; and creating a VLAN if said searching does not result in locating the VLAN, the creating including: selecting a starting access port from the two or more access ports, mapping a base path from the starting access port to another of the access ports, wherein the base path includes one or more of the switches and one or more of the trunks, and adding the base path to the VLAN including the starting access port and said another of the access ports.
 19. The computer-readable storage medium of claim 18 wherein the mapping a base path includes: selecting a pre-selected number of the two or more access ports; creating a list of least cost paths from the starting access port to each of the selected access ports, wherein each of the paths include one or more of the switches and one or more of the trunks; and selecting a longest length path from the list for the base path.
 20. The computer-readable storage medium of claim 18, wherein the method further comprises for each of the two or more access ports not currently located in the VLAN: mapping a new path from the access port to one of the switches in the VLAN; adding the new path to the VLAN including the access port; and transmitting the VLAN to the VLAN database. 